Spin waves and Dirac magnons in a honeycomb-lattice zigzag antiferromagnet BaNi2(AsO4)2

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dc.citation.articleNumber214432
dc.citation.issueNumber21
dc.citation.journalTitlePhysical Review B
dc.citation.volumeNumber104
dc.contributor.authorGao, Bin
dc.contributor.authorChen, Tong
dc.contributor.authorWang, Chong
dc.contributor.authorChen, Lebing
dc.contributor.authorZhong, Ruidan
dc.contributor.authorAbernathy, Douglas L.
dc.contributor.authorXiao, Di
dc.contributor.authorDai, Pengcheng
dc.date.accessioned2022-01-21T20:47:39Z
dc.date.available2022-01-21T20:47:39Z
dc.date.issued2021
dc.description.abstractThe topological properties of massive and massless fermionic quasiparticles have been intensively investigated over the past decade in topological materials without magnetism. Recently, the bosonic analogs of such quasiparticles arising from spin waves have been reported in a two-dimensional (2D) honeycomb-lattice ferromagnet/antiferromagnet and a 3D antiferromagnet. Here, we use time-of-flight inelastic neutron scattering to study spin waves of the S=1 honeycomb-lattice antiferromagnet BaNi2(AsO4)2, which has a zigzag antiferromagnetic (AFM) ground state identical to that of the Kitaev quantum spin liquid candidate α−RuCl3. We determine the magnetic exchange interactions in the zigzag AFM ordered phase, and show that spin waves in BaNi2(AsO4)2 have symmetry-protected Dirac points inside the Brillouin zone boundary. These results provide a microscopic understanding of the zigzag AFM order and associated Dirac magnons in honeycomb-lattice magnets, and are also important for establishing the magnetic interactions in Kitaev quantum spin liquid candidates.
dc.identifier.citationGao, Bin, Chen, Tong, Wang, Chong, et al.. "Spin waves and Dirac magnons in a honeycomb-lattice zigzag antiferromagnet BaNi2(AsO4)2." <i>Physical Review B,</i> 104, no. 21 (2021) American Physical Society: https://doi.org/10.1103/PhysRevB.104.214432.
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.104.214432
dc.identifier.urihttps://hdl.handle.net/1911/111944
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.titleSpin waves and Dirac magnons in a honeycomb-lattice zigzag antiferromagnet BaNi2(AsO4)2
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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